31311321093 has 32 divisors (see below), whose sum is σ = 50320099200. Its totient is φ = 19127829888.

The previous prime is 31311321091. The next prime is 31311321103. The reversal of 31311321093 is 39012311313.

It is not a de Polignac number, because 31311321093 - 2¹ = 31311321091 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31311321091) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 277483 + ... + 373656.

It is an arithmetic number, because the mean of its divisors is an integer number (1572503100).

Almost surely, 2^31311321093 is an apocalyptic number.

It is an amenable number.

31311321093 is a deficient number, since it is larger than the sum of its proper divisors (19008778107).

31311321093 is a wasteful number, since it uses less digits than its factorization.

31311321093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651298 (or 651292 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The spelling of 31311321093 in words is "thirty-one billion, three hundred eleven million, three hundred twenty-one thousand, ninety-three".